Oil & Gas
| Sun 01 Nov 2026
Beijing, Oct. 31 -- PetroChina has submitted a patent application for Gate Ejection Mechanism of Gate Valve. This invention was developed by Shang Desheng, Du Yehui, Lin Li, Zhuang Fengdong, Wang Shangdian, Zhang Zhidan, Yang Ming, Xia Qinghua, Dong Lei, Qi Ming, Mu Songfeng and Xiao Yin.
The patent application number is CN2025..